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4W 96MHz Amplifier (2N7000/BS170) !!

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4W 96MHz Amplifier (2N7000/BS170) !! Empty Re: 4W 96MHz Amplifier (2N7000/BS170) !!

Post by Ivan Sat Sep 11, 2021 7:32 pm

Hi,
yes, it is much better, although the sides still disappear in the shadow.

VBR from Ivan

Ivan

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4W 96MHz Amplifier (2N7000/BS170) !! Empty Re: 4W 96MHz Amplifier (2N7000/BS170) !!

Post by dare4444 Sat Sep 11, 2021 6:48 pm

New imported gif image posted Ivan.


Last edited by dare4444 on Sat Sep 11, 2021 8:42 pm; edited 1 time in total

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4W 96MHz Amplifier (2N7000/BS170) !! Empty Re: 4W 96MHz Amplifier (2N7000/BS170) !!

Post by Ivan Sat Sep 11, 2021 10:04 am

Please export the schematics to a graphic format directly. The readability of photos of a monitor is quite bad.

Thanks. BR from Ivan OK1SIP

Ivan

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4W 96MHz Amplifier (2N7000/BS170) !! Empty Re: 4W 96MHz Amplifier (2N7000/BS170) !!

Post by dare4444 Sat Sep 11, 2021 3:03 am

12V and R10 = 2.2ohm, Po is 3.4W , each mosfet burning 250mW as heat. Pin is 96MHz at 360mW

A solid 3W at 12V on 96MHz! BS170 should work as expected.  LtSpice is awesome.

Load = 75ohm


Last edited by dare4444 on Sat Sep 11, 2021 10:54 pm; edited 3 times in total

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Post by dare4444 Sat Sep 11, 2021 1:17 am

Drive level is 360mW @ 96MHz.

0.4A final stage current @ 19.2V or all three mosfets combined.

DC input = 5.4W
RF output = 4.5W into 75ohm dummy load after LPF. Half wave dipole antenna is recommended.


Last edited by dare4444 on Sat Sep 11, 2021 10:52 pm; edited 5 times in total

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4W 96MHz Amplifier (2N7000/BS170) !! Empty Re: 4W 96MHz Amplifier (2N7000/BS170) !!

Post by dare4444 Sat Sep 11, 2021 1:08 am

....


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4W 96MHz Amplifier (2N7000/BS170) !! Empty 4W 96MHz Amplifier (2N7000/BS170) !!

Post by dare4444 Sat Sep 11, 2021 1:08 am

4W 96MHz Amplifier (2N7000/BS170) !! Img_2135
4W 96MHz Amplifier (2N7000/BS170) !! Img_2134


Last edited by dare4444 on Sat Sep 11, 2021 8:43 pm; edited 2 times in total

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4W 96MHz Amplifier (2N7000/BS170) !! Empty Re: 4W 96MHz Amplifier (2N7000/BS170) !!

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